STEP 14:球只是直线上下运动!让我们在每次反弹时稍微改变 x 速度!

  • 并在head_ball()函数的底部拖入Get x Speed
  • sprite更改为hit_sprite
  • 并拖动Set x Speed 。将sprite更改为hit_sprite
  • 将括号中的5替换为等式( my_var + 1 ) 。确保my_var为正!

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def set_stage(): """ Sets up the stage for the game """ stage.set_background("soccerfield") stage.disable_floor() def add_player(): """ Adds a player to the stage for the user to control """ player = codesters.Sprite("player1") player.go_to(0, -180) player.set_size(0.75) return player def add_ball(): """ Adds a ball to the stage and sets its attributes """ ball = codesters.Sprite("soccerball") ball.set_y_speed(-8) def head_ball(sprite, hit_sprite): """ Detects collisions between the player and ball """ my_var = hit_sprite.get_y_speed() hit_sprite.set_y_speed(-my_var + 1) def main(): """ Sets up the program and calls other functions """ set_stage() player = add_player() add_ball() player.event_collision(head_ball) main()
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